\doc
TITLE. Air temperature, ET, and solar radiation data for B1 data logger (DP219), 1987 - 2000.
ABSTRACT. Climatological data were collected from a ridgetop climate station east of Niwot Ridge (B1 at 2591 m) throughout the year using an Omnidata DP219 datapod. This instrument has a sample interval of 10 minutes and maximum and minimum values are instantaneously recorded. Averages are means of 144 values and totals are totals of 144 values. Parameters measured were evapotranspiration, solar radiation, maximum temperature, minimum temperature, and average temperature.
INVESTIGATOR. Mark Losleben, Tree-Ring Lab, University of Arizona, 1215 E. Lowell Street, Box 210045, Tucson, AZ 85721, losleben@email.arizona.edu.
Contact: Jennifer Morse, INSTAAR, University of Colorado, 4001 Discovery Dr., UCB 450, Boulder, CO 80309-0450, jennifer.f.morse@colorado.edu.
VARIABLES. maximum air temperature, minimum air temperature, average air temperature, total solar radiation, evapotranspiration.
KEYWORDS. climate, weather, meteorology, air temperature, evapotranspiration, solar radiation, B1, sensor, dp219, data logger, datapod, Niwot Ridge LTER, NWT, Arapaho and Roosevelt National Forests, long term
LOCATION. Study site was B1 (located on the north side of and approximately 4 miles from the east end of Sugarloaf Road). Original data are stored with the NWT LTER data manager and at the Mountain Research Station.
TIMING. begin 25 July 1987, end 19 December 2000, daily.
CITATIONS. [1]Losleben, M.V. 1990. Climatological data from Niwot Ridge, East Slope, Front Range, Colorado, 1989. University of Colorado Long-Term Ecological Research Data Report 90/1. 108 pp.
METHODS. The lower detection limit for the DP219 temperature sensors is -17.8 degrees Celsius. Thus, if the maximum temperature was listed as -17.8 degrees Celsius, then the maximum, minimum, and average temperatures were all less than or equal to -17.8 degrees Celsius. If the maximum temperature was listed as being greater than -17.8 degrees Celsius and the minimum temperature was listed as -17.8 degrees Celsius, then the minimum and average temperatures were less than or equal to their recorded values. The instrument station was vandalized sometime between 21 June 1992 and 8 February 1993 and all data for that period were lost. Instrumentation was not replaced until 12 May 1993. The instrument station was vandalized on 20 December 2000. Instrumentation was not replaced until 08 May 2002.
Metadata for other B1 data sources:
http://niwot.colorado.edu/exec/meta_data/b-1hobo.hourly.jm.meta.txt
http://niwot.colorado.edu/meta_data/b-1mtape.ml.meta.txt
http://niwot.colorado.edu/exec/meta_data/b-1preci.ml.meta.txt
Pod storage filled on 23 February 1997, so no data from then until 16 May 1997.
\type
statistical
\header
COL1. label=date, type=string, units=none, missing value indicator=NaN, minimum=1987-07-25, maximum=2000-12-19, precision=, definition=date (yyyy-mm-dd)
COL2. label=year, type=integer, units=none, missing value indicator=NaN, minimum=1987, maximum=2000, precision=1, definition=year (yyyy)
COL3. label=jday, type=integer, units=none, missing value indicator=NaN, minimum=1, maximum=366, precision=1, definition=Julian day
COL4. label=airtemp_max, type=real, units=celsius, missing value indicator=NaN, minimum=, maximum=, precision=, definition=maximum air temperature
COL5. label=airtemp_min, type=real, units=celsius, missing value indicator=NaN, minimum=, maximum=, precision=, definition=minimum air temperature
COL6. label=airtemp_avg, type=real, units=celsius, missing value indicator=NaN, minimum=, maximum=, precision=, defintion=average air temperature
COL7. label=solrad_tot, type=real, units=megajoulePerMeterSquared, missing value indicator=NaN, minimum=, maximum=, precision=, definition=total solar radiation
COL8. label=ET, type=real, units=millimeter, missing value indicator=NaN, minimum=, maximum=, precision=, definition=evapotranspiration
\data
http://niwot.colorado.edu/data_csvs/b-1dp219.ml.data.csv
\log
The documentation section of this file was developed from the NWT LTER Data Directory (Symphony files DDABSTRA.WR1, DDDOCUME.WR1, DDMASTER.WR1, DDVARIAB.WR1; last updated 16 December 1991) by Susan Kindig and Rick Ingersoll in mid-February 1993. On 12 March 1993 data were added from DP219 datapod files for the period from 25 July 1987 through 21 June 1992. These files had been processed on culter and quality checked by Mark Losleben in late 1992 and early 1993. See "Raw DP219 Datapod Files" in THE MANAGEMENT OF NWT LTER DATA ON CULTER for additional information. [RCI 12 March 1993] This file was put under sccs control on 30 March 1993. See the appropriate history file for additional log information.[RCI 30 March 1993] Data for the 12 May to 2 October 1993 period were appended to the data section on 10 November 1993. Comments regarding vandalism at the site were added at that time as well.[RCI 10 November 1993] The data section was converted to a comma delimited (as opposed to whitespace) one in order to be more consistentwith other climate data files.[RCI 21 February 1994] Data for the period 4 October 1993 through 13 June 1994 were appended to the data section on 24 June 1994.[RCI 24 June 1994] Data for the period 14 June 1994 through 18 February 1995 were appended to the data section on 6 April 1995.[RCI 6 April 1995] Data for the period 19 February 1995 through 13 October 1995 were appended to the data section on 16 November 1995.[MAH 16 November 1995] Data for the period 14 October 1995 through 12 June 1996 were appended to the data section on 20 June 1996. Also on 20 June 1996, it was noticed that the header for column 1 incorrectly listed January 1 1900 as day 1 instead of day 0, and was changed accordingly.[MAH 20 June 1996] Data for 13 June 1996 through 23 February 1997 were appended to the data section on 31 July 1997.[MAH 31 July 1997] URL locations for related data were updated on 31 August 2000.[MAH 31 August 2000] Data for the period 24 February 1997 through 24 October 2000 were appended to the data section on 20 April 2001.[TMA 20 April 2001] Data for the period 26 October 2000 to 19 December 2000 were appended on 19 September 2001.[TMA 19 September 2001] Data for the period 08 May 2002 to 16 September 2002 were appended to the data section on 03 January 2003.[TMA 03 January 2003] Data for 17 September 2002 through 05 July 2005 were appended to the data section. Blank data filler was added to the data section for the period where data was lost due to vandalism 20 December 2000 through 06 May 2002.[TMA 25 August 2005] Data for the period 05 July 2005 through 16 March 2006 were appended to the data section.[TMA 21 May 2007] Column labels were shortened and definitions added; order of variables was changed. Title, investigator, and keywords were updated.[HCH 10 February 2016] Temperature units changed to celsius.[HCH 27 April 2017]